Tool holder



V. HOVANEC.

TOOL HOLDER.

APPLICATION HLED NOV. 5. 1921.

Patented J uly 4, 1922.

FIG. 5

I FIG.3

iaeaose.

area,

VALENT HOVANEC, OF AMBRIDGE, PENNSYLVANIA.

TOOL HOLDER.

Application filed November 5, 1921.

To all whom it may concern:

Be it known that I, 'VALENT HOVANEO, a citizen of the United States of America, residing at Ambridge, in the county of Beaver and State of Pennsylvania, have invented certain new and useful Improvements in Tool Holders, of which the following is a specification.

This invention relates to certain new and useful improvements in tool holders and more especially to those of that character or type which are-socketed to receive the shank of a tool and adapted to be nested together in order that tools of different sizes may be used with the same machine press or spindle.

The primary object of this invention is to provide a plurality of socketed tool holders of diiferentsizes nested together in an improved manner whereby change from one sized holder to another may be readily accomplished in a desirable manner.

Another object is to provide the inner tool holder with means for looking a tool in the socket thereof and engageable by the outer holder for preventing release of the tool until said outer holder is removed. With the above general objects in view and others that will appear as the nature of the invention is better understood, the invention consists in the novel form, combination and arrangement of parts hereinafter more fully described in connection with the accompanying drawing, in which like characters designate corresponding parts throughout the several views.

In the drawings,

Figure 1 is a view in side elevation of tool holders of different sizes nested together in operative relation and carrying a. drill, p-art of which is broken away,

Figure 2 isa view similar to Figure 1 looking toward the right.

Figure 3 is a substantially central vertical sectional view of the device shown in Figures 1 and 2,

Figure 4 is a vertical sectional view of the] lower portion of the device shown in Figure 3 with the plane of section at right angles to the plane of section in Figure 3,

Figure 5 is a horizontal sectional view taken upon line V-V of Figure 3,

Figure 6 is a side elevational view, artly broken away, of the form of tool a apted to be employed with the present tool holders, and

Specification of Letters Patent.

Serial No. 513,155.

Figure 7 is a side elevational view of a form of lock releasing tool which may be employed for releasing the lock of the intermediate sized tool holder.

Referring to the drawing, wherein a plurality of drill sleeves are shown as being constructed to embody the present invention, 5 designates the smallest drill sleeve or holder having a tang 6 at its upper end and provided with a short longitudinally extendng slot 7, adjacent said tang, said sleeve or holder being also provided with a longitudinally extending socket adapted to receive the shank end of a drill 8 or other tool.

A second and largest tool holder 9 has a longitudinally receive the shank end of a larger drill or tool corresponding in size to the smallest tool holder 5 so that the latter may be 'received in the socket of the holder 9 as clearly illustrated in Figures 3 and 4, the holder 9 being provided witha slot 10 at the inner end of its socket for reception of the tang 6' whereby relative rotation of the holders 5 and 9 is prevented, and the holder 9 being provided with a short longitudinally extending slot 11 communicating with the slot 10 to give access to a drift pin for the usual well known purpose, this being also the purpose of providing the slots 7.

In accordance with the present invention, the tool employed will involve a tang 12 to be received in the inner end of the socket of each holder whereby relative rotation of the holder and tool is prevented and the shank of the tool will also be reduced adjacent the tang 12 as at 13 to provide and annular bottom shoulder 14. When the tool is of such size as to be employed in the holder 5, the shoulder 14 will gag-ed .bythe lower hooked end of a catch .15 which is pivoted upon a horizontal axis as at 16 to the holder 5 within a side slot 17 provided in said holder 5, and the construction will be such as to have the outer edge of the catch 15 lie substantially flush with the outer surface of the holder 5 when said catch-is in looking position so that when the largest holder 9 is disposed on the holder 5, the first named holder will prevent removal of the tool 8 and prevent access to the catch 15 for this purpose.

The largest holder 9 is also provided with, a side'slot beside the slots 10 and 11 as at 18 inwhich a further catch19 is pivoted upon a horizontal axis as at 20, said catch extending socket adapted to Patented July 4, 1922.

' to engage a corresponding shoulder 14 provided on the holder 5 near the tang 6 thereof by reducing the upper end of said holder 5.

The largest holder 9 is provided with av reduced upper end providing an extension or shank 22 adapted to be snugly received within the socket of an intermediate sized holder 23 whose socket is also adapted for snug reception of the shank end of an 1ntermediate sized tool, and the shank 22 is reduced or cut away near its upper end to provide a shoulder or shoulders 24 slightly below a tang 25 provided upon the upper end of said shank 22. The socket of the holder 23 may be provided to snugly receive the tang 25 and particularly to engage oppositesides of said tang as indicated in cross section by Figure 5 whereby tion of the holders 9 and 231s prevented.

The holder 23 is provided with a socket or chamber 26 above the tang 25 communicat ing at one side with a side slot 27 provided in the holder 23, in which slot 27 a catch 28 is pivoted upon a horizontal axis as at 29. The catch 28 is provided with a hooked lower end adapted to engage the shoulder 24 for securely retaining the shank 22 within the socket of the holder 23 or to engage the shoulder 14 of the proper tool for retaining the latter in place. The catch 28 is provided with a lateral extension per end directed inwardly so as to lie in line and engage vided with a with an axial opening 30 provided in the upper'end, of the holder 23 and to overlie the tang 25' of the shank 22 or the tang 1-2 of the tool. A spring 31 may be interposed between the lateral extension of the catch 28 and the tang 25 or 12 for urging the catch 28 to locking position and; said catch may be forcibly released against the action of the spring 31 by forcin downwardly upon the lateral extension 0 said catch. This may be accomplished by means of a tool such as shown in Figure 7 involving a 'stem 32 adapted to extend through the opening 30 the upper surface of the lateral extension provided on the upper end of the catch 28, said stem 32 being preferably prohandle 33 for its convenient manipulation. In the preferred. construction of the holder 23, the slot 27 is made comparatively large at its up er end for the insertion of the catch 28 an the spring 31 relative rota- If-the size of drill which is desired to be employed is the smallest one or that adapted to be received by the holder-5, said tool s placed within the socket of the holder 5 and the latter is then positioned in the holder 9 as'shown so that the catch 15 is effectively held in engagement with the shoulder 14 while the shank 22 is held within the socket of the holder 23 by means of the catch 28, and it is noted that the upper end of the holder 23 is so formed as to be held in the chuck provided on the usual machine spindle.

' Should an intermediate sized drill be desired, the pin 32 may be inserted in the opening 30 upon the holders 5 and 9 may be separated from the holder 23 without disturbing the relation of the holders 5 and 9 and the tool carried by said holder 5. On the other hand,

should the larger socket 9 be desired, the

catch 28 is not disturbed but the catch 19 is manually released so as to allow withdrawal ofthe holder 5 without disturbing the relation of the latter holder and its tool 8.

From the foregoing description, it is believed that the construction and operation as. well as the advantages of the present invention will be readily understood and ap'preciated by those skilled in the art.

Minor changes may be made without departing from the spirit and scope of the invention as claimed.

What is claimed as new is:

1. A plurality of socketed tool holders of difierent' sizes nested together, and means'105- operable to locka tool within the smaller tool holder and engageable by the next larger tool holder for preventing Separation of the tool'andthe first named holder until said holders are separated, means carried by the larger tool holder to engage the smaller tool holder for retaining said tool holders nested and adapted to engage and retain a larger tool, said'larger tool holder having a shank on one end thereof, and a further intermediate sized socketed tool holder adapted for snug reception of said shank, said last named tool holder being provided with means engageable with said shank an retain the latter within the socket thereof and to engage an intermediate sized tool for retaining the latter in said socket thereof.

2. A plurality of socketed tool holders of different sizes nested together, and means operable to kick a tool within the smaller tool holder and engageable by the next larger toolholder for preventing separation of the tool and the first named holder until said holders are separated, means carried by the larger tool holder to engage the so as to release the catch 28 where- 85 smaller tool holder for retaining said tool tool for retaining the latter in said socket holders nested and adapted to engage and thereof, the last named tool holder being retain a larger tool, said larger tool holder provided with an axial opening in the uphaving a shank on one end thereof, and a per end thereof, and said last named means 5 further intermediate sized socketed tool including a pivoted spring pressed catch 15 holder adapted for snug reception of said having an inward lateral extension releasshank, said last named tool holder 'being able by an instrument inserted through said provided with means engageable with said opening. shank to retain the latter within the socket In testimony whereof I aflix my signature.

10 thereof and to engage an intermediate sized VALENT HOVANEC. 

